Improvement in covers and traps for sewer-basins



WILLIAM H. cHAsExL GEORGE WHITE.

Improvement in Cover and Traps for Sewer Basins.

Patented April 2,1872.

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UNITED STATES PATENT FFICE.

WILLIAM H. CHASE AND GEORGE WHITE, OF WASHINGTON, D. O.

IMPROVEMENT IN COVERS AND TRAPS FOR SEWER-BASINS.

Specification forming part of Letters Patent No. 125,118, dated April 2,1872.

To all whom it may concern:

Be it known that we, WILLIAM H. CHASE and GEORGE WHITE, of Washington,in the District of Columbia, have invented certain new and usefulImprovements in Cover and Trap for Sewer-Basins; and do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawing and to the letters ofreference marked thereon making a partofthis specification.

The nature of our invention consists in the construction and arrangementof a cover and trap for sewer-basins, as will be hereinafter more fullyset forth.

In order to enable others skilled in the art to which our inventionappertains to make and use the same, 'we will now proceed to describeits construction and operation, referring to the annexed drawing, inwhich- Figure 1 is a perspective view, and Fig. 2 a longitudinalvertical section, representing a cover for a sewer-basin located at thecorner of a street. a

A represents the top of the sewer-basin cover and trap, having threestraight sides and one curved; also an opening, a, which may be circularor any other desired shape, with a shoulder or rim, b, below the surfaceof the top A. Upon this shoulder or rim the lid B rests. From the frontor curved side of the top A projects downward a flange, (J, and to thelower end of the same is attached a plate, D, which projects forward,forming the sill of the trap. This plate D is provided with a concavity,as shown, and, the flange G having an opening, they together form themouth of the sewer-basin. The entire top A, with the flange G, is castin one piece of iron, the top being corrugated and the plate D boltedfirmly in its place, making the whole not only cheap, but durable andvery easily put in position at the corners of streets. Under the top Ais hung or pivoted a valve, E, so arranged that its normal position isto close the mouth, but the flow of water into the basin will open thevalve. will in a great measure be prevented from rising from the sewer.

Having thus fully described our invention,

what we claim as new, and desire to secure by Letters Patent, is-

A cover or trap for sewer-basins, consisting substantially of thecorrugated top A, cast in one piece, of iron, with the flange O, and thecover B, plate D, and valve E, all as and for the purposes herein setforth.

In testimony that We claim the foregoing we have hereunto set our hands.this day of February, 1872.

' WILLIAM H. CHASE.

GEORGE WHITE.

Witnesses:

DAVID E. SMITH, EDWARD LACY.

By this means all offensive odors I

